Issue: The recorded file of an NDI|HX source only shows black output.
Resolution: An NDI|HX source cannot be recorded via IsoCording. Instead, a Mix will need to be configured to the source in order to record it. Open the Output configuration tab and change one of the Mix sources from "Program" to the Input where your NDI|HX source is set to. Now, in the Record configuration, select that Mix so it will be captured/recorded.